There are papers that demonstrate the discriminatory effects of voter ID laws on minority turnout [1], and these sorts of interview videos are easy to produce in a way that selectively validates the statement you want to convey. I don't know the data on a regional basis, but it could be the case that residents of places like New York City are better informed than those in other regions of the country.
[1] http://pages.ucsd.edu/~zhajnal/page5/documents/voterIDhajnal...